Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light.
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The strongly enhanced and localized optical fields that occur within the gaps between metallic nanostructures can be leveraged for a wide range of functionality in nanophotonic and optical metamaterial applications. Here, we introduce a means of precise control over these nanoscale gaps through the application of a molecular spacer layer that is self-assembled onto a gold film, upon which gold nanoparticles (NPs) are deposited electrostatically. Simulations using a three-dimensional finite element model and measurements from single NPs confirm that the gaps formed by this process, between the NP and the gold film, are highly reproducible transducers of surface-enhanced resonant Raman scattering. With a spacer layer of roughly 1.6 nm, all NPs exhibit a strong Raman signal that decays rapidly as the spacer layer is increased.
Published Version (Please cite this version)
Hill, Ryan T, Jack J Mock, Yaroslav Urzhumov, David S Sebba, Steven J Oldenburg, Shiuan-Yeh Chen, Anne A Lazarides, Ashutosh Chilkoti, et al. (2010). Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light. Nano Lett, 10(10). pp. 4150–4154. 10.1021/nl102443p Retrieved from https://hdl.handle.net/10161/4095.
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